Writing instrument



FIG. 1 is a front elevational view of the writing instrument according to the present invention;

FIG. 2 is a rear elevational view of the writing instrument of FIG. 1;

FIG. 3 is a right side elevational view of the writing instrument of FIG. 1, the left side being a mirror image of the right side;

FIG. 4 is a top plan view of the writing instrument of FIG. 1;

FIG. 5 is a bottom plan view of the writing instrument of FIG. 1; and ,

FIG. 6 is a perspective view of the writing instrument, with the writing tip of the writing instrument of FIG. 1 being extended. 

The ornamental design for a writing instrument, as shown and described. 